Skip this signal creation on Windows.
Skip this signal creation on Windows.

SIGUSR1 doesn't exist on Windows and this event was causing
the minion to crash on Windows

I'm not sure this is the best way to take care of this. But I'm not
sure how to actually implement this in Windows yet.
Google seems to imply that win32events would provided this
functionality, but I haven't figured out how to use it yet.

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt